<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
      <script>
        function foo()
        {
             alert("hhhh")   
        }


       function printInfo(name,age,id)
        {
             console.log(name,age,id);

             return [name,age,id];
        }

        console.log(val)

        foo();

        var val = printInfo("陈庆",12,12390);
        console.log(val);

        function S(len,height)
        {
            return len*height;
        }
        
        var val = S(20,30);
        console.log(val);

        

      </script>
</body>
</html>